boomer



0.P.'B 00MBR. V xMeans of Rendering Lard, &c.

(No Model.)

Patented M-ay10,1881.

N. PEI'ERS, Photo-Lithographer. Washington, 0.0.

NHED STATES PATENT OFFICE.

OSCAR F. BOOMER, OE{ BROOKLYN, ASSIGNOR OF ONE-THIRD TO ANDERSON FOWLER, OF NEW YORK, N. Y.

MEANS OF RENDERING LARD, 80C.

SPECIFICATION forming part of Letters Patent No. 241,119, dated May 10, 1881.

Application filed February 24, 1881. (No model.)

To all whom it may concern:

Be it known that I, OSCAR FINN BOOMER, of Brooklyn, in the county of Kings and State of New York, have invented certain Improvements in Means of Rendering Lard, 850., of

which the following is a specification.

In the practice of this invention the lard or similar substance to be rendered or tried out is passed in a thin sheet between successive pairs of heated rollers, and in contact with peculiarly-constructed scrapers, whereby the melted lard or liquid oily material expressed from the material by each pressing action of the rollers is conveyed away preliminary to the next compressing action of the rollers, a most rapid and effective separation of the melted oleaginous material from the scraps or cellular matter being by this means secured. The scraps, after being thus deprived of the oily constituents of the lard or the like, are conveyed away by an endless apron provided with suitable adjuncts.

, The invention comprises a novel process, and certain novel combinations of parts, whereby the modus opcrcmdi herein before briefly set forth is effectually carried out.

Figure 1 is a vertical sectional view of an apparatus which forms part of my said invention. Fig. 2 is a similar sectional view, but taken in a plane atright angles to that of Fig. 1. Figs. 3, 4, and 5 are detail views, on a larger scale, of certain devices included in the construction of the said apparatus.

A is the frame of the machine, provided at its ends with suitable bearin gs for successive pairs of rollers, a b c d e, the said pairs being placed one above an other, as indicated in Figs. 1 and 2, and each pair at a suitable distance from those adjacent. The two rollers to each pair are placed sufficiently close together to exert the requisite squeezing or pressing action upon the material passed between the said two rollers. In practice I propose that the axles or journals of these rollers shall be placed in sliding bearings pressed inward toward each other by springs; but as such spring-bearings are well known to machinist-s and mechanics generally no specific description of them is necessary here.

B is a long chamber, in the under side of which is a narrow slit or opening,f, and extending upward from the said chamber B is a pipe, 0, of suitable diameter, and which communicates with any suitable mechanism for forcing the lard or other material to be rendered or tried out down through the said pipe into the chamber B, and thence out through the narrow opening f. Inasmuch as the narrow openingf is immediately above and coincident with the line of junction of the two rollers to the uppermost pairs, at, it follows that the sheet of material descending endwise, or, so to speak, ed gewise, will pass edgewise between the two. rollers of the uppermost pair in the most advantageous position for receiving the compressing action of the said rollers in passing between the same; and it will be further observed that the sheet of material descending to the uppermost pairof rollers, as just described, being of practical uniform thickness throughout its width, substantially the same quantity of material is deposited at all parts of the length of the rollers, thereby insuring a uniform pressure upon all portions of the material as it passes between the said rollers. The material may be forced down through the pipe 0, asjust hereinbet'ore indicated, byan y suitable mechanism. In practice 1 find a rotary pump to operate very efficicntly for such purpose.

The rollers a b c d c are hollow and turn on tubular journals, in order that steam admitted from a steam-pipe, D, may pass through allot the said rollers to heat the same, the steam finally making its exit through the outlet-pipe E, as indicated in Fig.1. The construction of hollow steam-heated rollers being well known to mechanical engineers, a specific construction need not be detailed in this connection. One of the rollers of each pair is rotated from a suitable vertical shaft, F, by bevel-gears g i, and the two rollers of each pair are causedto move in unison with each other by suitable spur-wheels, k, all as indicated in Fig. 1. The rollers, being heated as aforesaid, act upon the material passing between them and melt therefrom the liquefiable portions of said material. Placed below each pair of the steam-heated rollers aforesaid are two scrapers, Gr, the upper ends of each bearing against the contiguous end sides of the adjacent pair of rollers, as repre- 100 sented in Fig. 2. These scrapers G are of peculiar construction, being tubular, as shown in the detail view, Fig. 4, and with their upper inner surfaces perforated or provided with numerous holes, as represented in said Fig. 4, and also in Fig. 5. Each of the scrapers G has at its ends squared necks m, which fit into correspondingly-shaped bearings formed in slides I, which said slides work in suitable transverse horizontal guides formed in the end of the frame, and which are capable of being moved inward and outward by screws J, which work through suitable fixed nuts provided in said frame, as shown in the detail view, Fig. 3. One of theneeksm of each ofthe scrapers G is tubular and projects out beyond the end of the frame to a distance suflieient to afford room for the cock at. The liquefied lard expressed from the material passed between the rollers, as hereinafter explained, is allowed to escape from this tubular one of the necks 121 when the cock n is turned to permit the outtlow into a vessel placed to receive the liquid.

Placed below the series of rollers aforesaid is an endless belt, K, which runs over suitable rollers, 1', and which has its upper part running between two pressure-rollers, A B, and which has placed adjacent to one of its ends a rotating brush, C.

The operation of the apparatus is as follows: The sheet ofmaterial from the chamberB, passing between and in compressing contact with the upper pair of rollers, ct, simultaneously heated to melt out the liquefiable oily matter therefrom, and at the same time com pressed to expel, so far as may be, such liquefied matter from the matrix or cellular tissue of the mate rial. The liquefied material is thereby caused to flow otf upon the surfaces of the adjacent scrapers G, and, passing through the oritices of said scrapers, becomes entirely separated from the said matrix or cellular tissue, and, flowing into and through the interiors of the scrapers, is finally drawn off therefrom byturning the cook a, as hereinbcfore explained. The material, with a portion of its liquefiable oleaginous constituents thus expressed and separated, passes to the next adjacent pair of roll ers, where the operation is repeated, and another portion of the liquefiable constituents of the material is expressed and separated. This operation is continued successively by each pair of rollers until the lowest pair is reached, by which time the liquefiable oily constituents are all substantially eliminated from the mass, which now remains simply a scrap, and falls upon the endless apron K, and is carried by the movement of the said belt away from underneath the rollers, and finally thrown off at the end of the apron into the box L or into any other suitable receptacle, or, when desired, into a screw or hydraulic press, for expressing by any usual power and pressure any remains of the liquefiable oily material which may still exist in the scrap.

The function of the rollers A B is to express any of the liquid oily material which through any chance may have escaped the effective ac tion of the rollers.

Vhat I claim as my invention is- 1. The herein-described method of rendering or trying out lard and like materials bysubjecting the same to pressure at successive stages, and after each of said successive stages separating the expressed liquid oily material, all substantially as and for the purpose herein set forth.

2. The chamber B, having a narrow longitudinal opening, f, in combination with two or more series of heated compression-rollers, sub stantially as and for the purpose herein set forth.

3. The press for expressing the liquid oily constituents of lard and other like material, composed of two or more pairs of heated rollers arranged to operate in succession upon the material, and combined with means, substantially as described, for separating the liquefied oily constituents of the material after each compressing operation, substantially as and for the purpose herein set forth.

4. The hollow perforated scrapers G, constructed with suitable outlets for the escape of the liquefied oily material, in combination with one or more pairs of heated rollers, whereby the liquefied oily constituents of the material are separated, consequent upon the compression of the material between the rollers, substantially as and for the purpose herein set forth.

OSCAR F. BOOMER. Vitnesses CHAS. H. DOXAT, J AS. H. MATTHAEI. 

